CVE-2021-39923 describes a denial-of-service vulnerability in the PNRP dissector of Wireshark versions 3.4.0 to 3.4.9 and 3.2.0 to 3.2.17, affecting Debian Linux and Wireshark installations. With a CVSS score of 7.5 (High), this vulnerability can be triggered remotely without user interaction via packet injection or a crafted capture file, leading to a complete denial of service. Despite its severity, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 3.2.0, <= 3.2.17CPE matchmatch criteria | cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:* | ||
>= 3.4.0, <= 3.4.9CPE matchmatch criteria | cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:* | ||
10.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | ||
11.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* | ||
9.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
CVE-2021-39923
Jan 11, 2022wireshark: PNRP dissector large loop
Nov 17, 2021Large loop in the PNRP dissector in Wireshark 3.4.0 to 3.4.9 and 3.2.0 to 3.2.17 allows denial of service via packet injection or crafted capture file
Nov 9, 2021